Italian 70mm. To fit Italian shell. I think 73mm is isoAh 70mm? Really need Italian or do you mean 68mm shell or 73mm? I have just had a mad time hunting for a UN71/72 in 73mm shell - sold a 68mm on here last week and needed 73 instead - had to settle for a very corroded but still smooth UN52 from eBay - 11.00 gbp
Haha!.I’m having problems sourcing a nice one -Indeed 70mm Italian, 68/73 English.
They do exist but only seem to do so in a parallel universe....
https://www.allterraincycles.co.uk/shimano-un55-square-taper-bottom-bracket-italian-threadNot available
Sold out
Product not available
Etc etc
Gosh it was hard for me to find an English 73mm....I do hope someone on here has an Italian for you.